Which sentence has an unclear or missing pronoun antecedent?

a.
after talking to my friends, i realized it was not something i would enjoy.

b.
my mother lost one of her earrings down the drain.

c.
henry paid for his movie ticket entirely with quarters.

d.
the twins have made plans for their birthday party this weekend.

The basketball crashed against the backboard, and point guard sheena lunged for it. as she snatched the ball out of mid-air, the crowd cheered, chanting encouragement for her team, the monarchs. so far, the game had been a disaster. with 15 seconds left to go in the final quarter, the monarchs were 2 points shy of victory. what main idea do the details in the passage suggest? the point guard sheena was not a very good player. the monarchs had never lost a basketball game. the monarchs were worried about losing. the crowd was not supporting the monarchs.

Andy bernard laughed at my joke, spitting out his water. complete thought incomplete thought

How do the party's mottos reveal the true nature of the party? how effective are these mottos in motivating/controlling their citizens? provide specific evidence to support your response.